[v5.0.2] Snapshot interpolation fix

Fixes a major bug with snapshot interpolation that caused the game to sometimes be jittery

Also you no longer need to set non-static type and object_name properties on each instance, as they will be set automatically from the static ones in the Entity constructor

There are also a couple really minor changes in the project structure (moved the client-side entities from WarpDemo/Objects/Gameplay to Warp/Objects/Entities)

Enjoy!
- Evoleo